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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0259 -- [Solaris] A Security Vulnerability Relating to Inter-Process Communication (IPC) May Lead to a Denial of Service 13 March 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Sun Microsystems Operating System: Solaris 10 Impact: Denial of Service Access: Existing Account Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-231403-1 - --------------------------BEGIN INCLUDED TEXT-------------------- Solution Type: Sun Alert Solution 231403 : A Security Vulnerability Relating to Inter-Process Communication (IPC) May Lead to a Denial of Service (DoS) Bug ID: 6642234 Product Solaris 10 Operating System Date of Resolved Release: 11-Mar-2008 SA Document Body A Security Vulnerability Relating to Inter-Process Communication (IPC) May Lead to a Denial of Service (DoS) 1. Impact A security vulnerability relating to the Inter-Process Communication (IPC) message queue sub-system may allow a local unprivileged user to block all I/O on a message queue until the system is rebooted. This is a type of Denial of Service (DoS). 2. Contributing Factors This issue can occur in the following releases: SPARC Platform * Solaris 10 with patch 127111-02 through 127111-09 and without patch 127111-10 x86 Platform * Solaris 10 with patch 127112-02 through 127112-09 and without patch 127112-10 Note: Solaris 8 and Solaris 9 are not affected by this issue. 3. Symptoms IPC message queue I/O (from the perspective of the application) to one or more message queues will hang. An attempt to ascertain the state of the message queue sub-system with the command $ ipcs -qa will also hang after the command has output its heading to the screen. For further confirmation that this issue has occurred, a system panic could be forced when the above symptom was being exhibited, and the following command run on the resultant core file: # echo "::walk thread_cache |::findstack !grep msg_fnd_neg_snd" |mdb -k unix.0 vmcore. 000002a10232eff1 msg_fnd_neg_snd+0xd8() This indicates that the kernel function msg_fnd_neg_snd() was present on one of the thread stack backtraces which is another symptom that this issue has likely occurred. Notes: 1. Care needs to be taken as to when and how a system panic is forced; utilities such as 'halt -d', 'reboot -d', or kmdb '$<systemdump' may be used for this purpose; however, contact your systems administrator or local support center for advice if you are in any way unsure about how to proceed with this operation. 2. By default, crash dumps are written to "/var/crash/<hostname>". See dumpadm(1M) for further information. 4. Workaround There is no workaround for this issue. Please see the Resolution section below. 5. Resolution This issue is addressed in the following releases: SPARC Platform * Solaris 10 with patch 127111-10 or later x86 Platform * Solaris 10 with patch 127112-10 or later For more information on Security Sun Alerts, see Technical Instruction ID 213557. This Sun Alert notification is being provided to you on an "AS IS" basis. This Sun Alert notification may contain information provided by third parties. The issues described in this Sun Alert notification may or may not impact your system(s). Sun makes no representations, warranties, or guarantees as to the information contained herein. ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN. This Sun Alert notification contains Sun proprietary and confidential information. It is being provided to you pursuant to the provisions of your agreement to purchase services from Sun, or, if you do not have such an agreement, the Sun.com Terms of Use. This Sun Alert notification may only be used for the purposes contemplated by these agreements. Copyright 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, CA 95054 U.S.A. All rights reserved - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBR9iDkSh9+71yA2DNAQJ9XQP/ZewU2oGLLLs4V1ZIyQ2XVYreYRKstj1Q Ha4+mH1VvM3eBEtai9tjhpp6W20kgU3pu2iKvNSLQ8YkMu0bV6AzoOd2RDpu/e1c 4rfu0QAKz2DPiS8q72FzmxfSQeY5MgEOcs8mH/bA4zjHU4sJ8EclMPglVQ/EusuY VUM+eH0ANak= =xYnX -----END PGP SIGNATURE-----